PAS 0 sets out the principles underpinning a BSI PAS publication and the principal features of the process by which it is developed. It does not discuss procedural detail and, reflecting the flexible nature of the product and process, is generally indicative rather than definitive in nature.

PAS 0 is intended as an exemplar of a BSI PAS in respect of structure, drafting principles and language, but alternative approaches may be adopted by agreement.